Mold for drain or sewer pipes.



PATENTED. JAN. 16, 1906.

J. B. HILL.

MOLD FOR DRAIN 0R SEWER PIPES.

APPLICATION FILED AUG.. 30. 1905.

JMJ ,gan/fa, Inventor.

Attorneys JAMES B. HILL, oE-fEINDL-AY, oIIIo.

' NIOLD`FOR DRAIN OR SEWER PI'PES..

Specification of vLetters Patent.

Patented J an. 16, 1906.

Application filed August 30, 1905. Serial No. 276,425.

To a/ZZ whom, it may concern:

Be it known that I, JAMES B. HILL, a citizen of the United States, residing at Findlay, in the county of Hancock and State of Ohio, have invented a new and useful Mold for Drain or Sewer Pipes, of which the following is a specilication.

This invention relates to molds .for manu,- facturing sewer-pipes, drains, and the like from cement, concrete, or other plastic material, and has for its object to provide an inexpensive, durable, and eicient mold of this character by means of which pipes of uniform thickness may be conveniently and expeditiously manufactured.

A further object of the invention is to generally improve this class of devices, so as to add to their utility and durability as well as to reduce the cost of manufacture.

With these and other objects in view the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described,` illustrated in the accompanying drawings, and pointed out in the hereto-appended claims, it being understood that various changes in form, proportion, and minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

In the accompanying drawings, forming a part of this specification, Figure 1 is a side elevation of a mold constructed in accordance with my invention. Fig. 2 is a longitudinal sectional view of the same. Fig. 3 is a top plan view, and Fig. 4 is a longitudinal sectional view illustrating a modified form of the invention.

Similar numerals of reference indicate corresponding parts in all the figures of the drawings.

The improved device comprises a supporting-base 5, provided with an annular flange 6, conforming to the thickness of the pipe or drain to be molded and defining oppositelydisposed shoulders 7 and 8 for engagement with the inner and outer shells of the mold. The inner casing or shell 9, which may be formed of metal or other suitable material, is preferably constructed in two sections 10 and 11, having their adjacent longitudinal edges overlapping, as indicated at 12, so that said sections may be quickly detached to thereby permit the ready removal of the molded product. The lower ends of the sections 10 and 11 are clamped in engagement with the shoulder 7 by an expanding ring or member 13, prefer- The upper ends of the sections 10 and 11. are t detachably secured together by a ring orcollar 15, having an annular groove 16 formedin its lower edge for the reception of the endsof said sections, as shown. v a.

Surrounding the inner shell 9 is a split expansible outer shell or casing 17, which bears against the shoulder 8 and is provided at its upper end'with a series of inwardly-extending lugs .or ears 18, which engage the exterior walls 'ofetheinner shell and serve to space the two shells. apart to `form the moldingchamg` ber 19..,f.. v .Y il

One longitudinal edge of the outer shellV or casing isbent upon itselfto form a vertical groove vor pocket 20, adapted 'to receive. the @i ilange21, produced by the offset portion 22in the adjacent longitudinal edge of the outer shell. The outer shell is locked in engagement with the shoulder 8 by one or more fastening devices, each comprising a loop or bail 22', pivotally mounted in suitable clips 23, secured to one longitudinal edge ofthe outer shell and adapted to engage a hook 24, pivotally mounted in similar clips secured to the grooved edge of the outer shell or casing. It will thus be seen that when the hooks 24 are passed through the loops 22 and the free ends thereof swung inwardly toward the outer shell the flange 21 will enter the pocket 20 and the lower edge of the casing be clamped in engagement with the shoulder 8 of the ange 6. Attention is here called to the fact that the inner shell or casing extends a short' distance above the outer shell, so that the cement, concrete, or other material when in troduced into the mold will strike said exten sion and be deflected downwardly into the molding-chamber.

In operation the two sections comprising the inner shell are placed against the shoulder, 7, after which the expanding ring is inserted and the ring or collar 15 positioned on the upper ends of the two sections. The outer shell is then placed in position on the base 5 and the fastening devices adjusted, after which the cement or other plastic material is shoveled or otherwise introduced into the compartment between the two shells. When the cement has set, the outer shell is released by unlocking the fastening devices and the IOO IOS

IIO

tWo sections comprising the inner shell Withdrawn from the pipe by first removing the .retaining-collar and lexpanding ring, thereby permitting the pipe to be conveniently removed to the drying-racks until ready for use. In Fig. 4 of the drawings there is illustrated a modified form of the invention, in which the flange 6' is framed With an extension 25 for producing a seating recess or socket in one end of the pipe, While the outer casing is provided Withan annular core member 26 for forming the opposite end of the pipe with an annular lip adapted to engage the seating-recess of an adjacent pipe When several of the pipes are laid into a sewer.

From the foregoing description it will be seen that there is provided a comparatively simple and inexpensive device admirably adapted for the attainment of the ends in vieW. Having thus described the invention, what is claimed isl. A mold comprising a base provided With an upwardly extending flange, a sectional inner shell engaging the adjacent Walls of thel flange, a sectional expanding ring resting on the base and serving to clamp the inner shell in engagement With'said Walls, an expansible outer shell of less height than the inner shell and spaced from the latter to favor an intermediate molding-chamber, inwardly-extending lugs secured to the upper end of the outer shell and adapted to engage the exterior Walls of the inner shell, loops pivotally mounted on one longitudinal edge of the outer shell, and hooks pivotally mounted on the adjacent longitudinal edge of the shell and adapted to engage said loops for clamping the outer shell in engagement With the flange.

2. A mold comprising a base provided with an upwardly-extending flange, a sectional inner shell engaging said iange, a flat sectional expanding ring engaging the interior Walls of the inner shell and provided with alined in Wardly-extending operating-handles, a retaining-collar provided with a seatinggroove for the reception of the upper end of the inner shell, a split expansible outer shell spaced from the inner shell, to form an intermediate molding chamber and having one longitudinal edge thereof formed with avertical groove adapted to receive the adjacent longitudinal edge of the outer shell, and means for clamping the outer shell in engagement With the ange.

In testimony that I claim the foregoing as my own I have hereto aiixedmy signature in the presence of two Witnesses.

JAMES B. HILL.

Witnesses:

J. E. MURRAY, C; B. DWIGGINS. 

